Dell Brocade G620 Brocade 8.0.1 Fabric OS Administratiors Guide - Page 25
Understanding Fibre Channel Services, Fibre Channel services overview
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Understanding Fibre Channel Services ∙ Fibre Channel services overview...25 ∙ Management server...26 ∙ Platform services...26 ∙ Management server database...27 ∙ Topology discovery...31 ∙ Device login...32 ∙ High availability of daemon processes...34 ∙ FL_Port and arbitrated loop support...35 Fibre Channel services overview Fibre Channel services define service functions that reside at well-known addresses. A well-known address is a reserved three-byte address for each service. Services are provided to either nodes or management applications in the fabric. FIGURE 1 Well-known addresses Fabric Login - The Fabric Login server assigns a fabric address to a fabric node, which allows it to communicate with services on the switch or other nodes in the fabric. The fabric address is a 24-bit address (0x000000) containing three 3-byte nodes. Reading from left to right, the first node (0x000000) represents the domain ID, the second node (0x000000) the port area number of the port where the node is attached, and the third node (0x000000) the arbitrated loop physical address (AL_PA), if applicable. Directory server - The directory server or name server registers fabric and public nodes and conducts queries to discover other devices in the fabric. Fabric controller - The fabric controller provides State Change Notifications (SCNs) to registered nodes when a change in the fabric topology occurs. Time server - The time server sends the time to the member switches in the fabric from either the principal switch or, if configured, the primary fabric configuration server (FCS) switch. Refer to Configuring Security Policies on page 215 for additional information on FCS policies. Management server - The management server provides a single point for managing the fabric. This is the only service that users can configure. Refer to Management server on page 26 for more details. Brocade Fabric OS Administration Guide, 8.0.1 53-1004111-02 25
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